废弃混凝土就地再生利用的经济效益分析

Analysis on Economic Benefit of On-site Recycling of Waste Concrete

摘要:

废弃混凝土就地再生利用能够减少施工现场混凝土废料的外运排放，加工后的再生料可替代天然砂石料用于施工，在国家“双碳”政策下具有较高的环保应用价值，但其前期成本投入及产出的不确定性较大制约了该技术的应用。以上海某大型基坑工程废弃混凝土就地再生利用的案例，通过案例中的废弃混凝土拆除量和回填利用量，对其废弃混凝土就地再生利用的经济效益进行分析，并将其与传统外运处置方式进行对比来测算两者成本投入及产出的效益平衡点，为类似工程废弃混凝土就地再生利用提供参考。

Abstract:

On-site recycling of waste concrete can reduce the external transportation and discharge of concrete waste from construction sites. The processed recycled materials can replace natural sand and gravel for construction, which has high environmental protection application value under the national “dual carbon” policy. However, the uncertainty in the initial cost input and output has greatly restricted the application of this technology. Taking a on-site recycling of waste concrete from a large-scale foundation pit project in Shanghai as a case study, the economic benefits of on-site recycling of waste concrete through its amounts of waste concrete removed and the backfilling recycling are analyzed. And it is compared with the traditional external transportation and disposal methods to calculate the benefit balance point of cost input and output between the two, providing a reference for the on-site recycling of waste concrete in similar projects.